Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe92cd79a495b985…

MALICIOUS

PDF

79.3 KB Created: 2021-03-01 15:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ce29700d7e3d43d730a67c9c8f83fce8 SHA-1: f121eef72629c957b39b4434a0e02e0d75918c64 SHA-256: fe92cd79a495b985d1f1982fbe6e9edc1818f2e87cdfbc2980ec87b507198866
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/strik?utm_term=mozart+the+magic+flute+song+list PDF link annotation
    • http://baranaydin.org/zifefutuzitib2uxuv.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/31572848247.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/JuU1hcM/33623065231.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/damip.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/h0B5cia/69529222725.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/02gcD7S/21824874483.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/ghhdVcZ/mario_party_10_bowser_amiibo_board.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/starting_out_with_java_from_control_structures_through_data_structures_4_e.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/iPIYjg1/35508116676.pdfIn PDF document text
    • https://cdn.sqhk.co/lotazoza/ggkhbjf/nail_salon_open_near_me_late.pdfIn PDF document text
    • http://4bochki.ru/stihl_f5_56_rc_restringghda7.pdfIn PDF document text
    • http://alkostore.xyz/can_you_front_face_in_baby_bjornabuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/c7Ej7QW/pafidetoforimosow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xulikamul/susotagapazorevalemipaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/centripetal_force_lab_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/95676087257.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/snowy_owl_aarakocra.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/nusuminufuzokazigulol.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 5352 bytes
SHA-256: 048236f2dc206d09631321d857ad5f3ef066b670c9938ac1da8a557596581f56
font_01_sfnt_off00010725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 11728 bytes
SHA-256: 37be081f2ae2f448f302c420abd49bb74d71c7882344974ab6c71b49a9d95db0

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